Security

Check for connected users via SNMPD on the OpenVPN host. No need to enable the OpenVPN management and/or introduce new checks on the Nagios server.

check_ossec monitors the connected/disconnected state of OSSEC (www.ossec.net) agents.

This plugin verifies the state of the clients connected to a openvpn server by means of the management interface.

Check if a particular user is logged in depending on his **CommonName**.

Perl plugin that checks a specified DNS blacklist such as bl.spamcop.net to see whether a host is listed. Depends on Net::DNS.

An improvement to mastrboy's original PHP check_ssl_cert.php -- this adds X.509 PKI Chain validation in addition to days-to-expiration the performance data. This is a draft/beta…

Checks the amount connected OpenVPN clients.

Checks an OpenVPN management server on a remote (or local) host. Written in PHP.

checks local x509 certificates for expiration

Plugin for checking the shorewall state

check the usability of a kerberos 5 KDC

Check Kerberos 5 KDC with shell commands